Variable valve mechanism, engine, and automatic two-wheeled vehicle
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United States of America Patent
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Jul 30, 2019
Grant Date -
Jan 11, 2018
app pub date -
Jun 30, 2017
filing date -
Jul 5, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention is capable of more smoothly changing a phase of a cam shaft in a rotation direction. A variable valve mechanism changes an opening/closing timing of an intake valve or an exhaust valve in response to an engine rotation speed. The variable valve mechanism includes: a cam sprocket which rotates in response to a rotation of a crank shaft; an intake cam shaft which is integrated with an intake cam and is provided to be rotatable relatively to the cam sprocket; and a link member that transmits a rotation from the cam sprocket to the intake cam shaft. The link member is supported by the cam sprocket to be swingable and swings in response to a change in rotation speed of the cam sprocket to rotate the intake cam shaft relatively to the cam sprocket.
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